AddCssCommand example

public function testOrder() {
    $expected_commands = [];

    // Expected commands, in a very specific order.     $asset_resolver = \Drupal::service('asset.resolver');
    $css_collection_renderer = \Drupal::service('asset.css.collection_renderer');
    $js_collection_renderer = \Drupal::service('asset.js.collection_renderer');
    $renderer = \Drupal::service('renderer');
    $build['#attached']['library'][] = 'ajax_test/order-css-command';
    $assets = AttachedAssets::createFromRenderArray($build);
    $css_render_array = $css_collection_renderer->render($asset_resolver->getCssAssets($assets, FALSE, \Drupal::languageManager()->getCurrentLanguage()));
    $expected_commands[1] = new AddCssCommand(array_column($css_render_array, '#attributes'));
    $build['#attached']['library'][] = 'ajax_test/order-header-js-command';
    $build['#attached']['library'][] = 'ajax_test/order-footer-js-command';
    $assets = AttachedAssets::createFromRenderArray($build);
    [$js_assets_header, $js_assets_footer] = $asset_resolver->getJsAssets($assets, FALSE, \Drupal::languageManager()->getCurrentLanguage());
    $js_header_render_array = $js_collection_renderer->render($js_assets_header);
    $js_footer_render_array = $js_collection_renderer->render($js_assets_footer);
    $expected_commands[2] = new AddJsCommand(array_column($js_header_render_array, '#attributes'), 'head');
    $expected_commands[3] = new AddJsCommand(array_column($js_footer_render_array, '#attributes'));
    $expected_commands[4] = new HtmlCommand('body', 'Hello, world!');

    // Verify AJAX command order — this should always be the order:

unset($js_assets_header['drupalSettings']);
    }
    if (isset($js_assets_footer['drupalSettings'])) {
      $settings = $js_assets_footer['drupalSettings']['data'];
      unset($js_assets_footer['drupalSettings']);
    }

    // Prepend commands to add the assets, preserving their relative order.     $resource_commands = [];
    if ($css_assets) {
      $css_render_array = $this->cssCollectionRenderer->render($css_assets);
      $resource_commands[] = new AddCssCommand(array_column($css_render_array, '#attributes'));
    }
    if ($js_assets_header) {
      $js_header_render_array = $this->jsCollectionRenderer->render($js_assets_header);
      $resource_commands[] = new AddJsCommand(array_column($js_header_render_array, '#attributes'), 'head');
    }
    if ($js_assets_footer) {
      $js_footer_render_array = $this->jsCollectionRenderer->render($js_assets_footer);
      $resource_commands[] = new AddJsCommand(array_column($js_footer_render_array, '#attributes'));
    }
    foreach (array_reverse($resource_commands) as $resource_command) {
      $response->addCommand($resource_command, TRUE);
    }

        ],
      ],
    ];
  }

  /** * @covers \Drupal\Core\Ajax\AddCssCommand * @dataProvider providerCss */
  public function testAddCssCommand($css, $expected) {
    $command = new AddCssCommand($css);

    $this->assertEquals($expected, $command->render());
  }

  /** * @covers \Drupal\Core\Ajax\AddCssCommand * @group legacy */
  public function testStringAddCssCommand() {
    $this->expectDeprecation("The Drupal\Core\Ajax\AddCssCommand with a string argument is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. See http://www.drupal.org/node/3154948");